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A. K.M.M.H. Meaze,Guinyun Kim,Dongchul Son,Hengsik Kang,Hossain Ahmed,In Soo Ko,Jong Hwa Chang,Kun Joong Yoo,Moo-Hyun Cho,Tae-Ik Ro,Won Namkung,Won-Chung Chung,Young Seok Lee,Young-Ae Kim 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.2
W. measure. tota. neutro. cross-section. o. natura. hafniu. i. th. neutro. energ. regio. fro. 0.. e. t. 10. e. b. usin. th. neutro. time-of- igh. metho. a. th. Pohan. Neutro. Facility. whic. consist. o. a. electro. linac. . water-coole. T. targe. wit. . wate. moderator. an. a. 11-m-lon.time-of- igh. path. . 6Li-ZnS(Ag. scintillato. wit. . diamete. o. 12.. c. an. . thicknes. o. 1..c. wa. use. a. . neutro. detector. an. . natura. hafniu. meta. plate. . . . c. i. are. b. 0. m. i. thickness. wa. use. fo. th. neutro. transmissio. measurement. Th. backgroun. leve. wa. determine. b. usin. notch-lter. o. Co. In. an. C. sheets. I. orde. t. reduc. th. gamm. ray. fro. Bremsstrahlun. an. fro. neutro. capture. w. employe. . neutron-gamm. separatio. syste. base. o. thei. dieren. puls. shapes. Th. presen. measuremen. wa. compare. wit. th. previou. one. an. th. evaluate. dat. i. ENDF/B-VI. Th. resonanc. parameter. wer. extracte. fro. th. transmissio. dat. b. usin. th. compute. cod. SAMMY. whic. utilize. bot. Dopple. an. resolutio. broadenin. effect. an. Bayes. generalize. leas. square. technique.
Photo-Neutrons Produced at the Pohang Neutron Facility Based on an Electron Linac
K. Devan,김귀년,A. K. M. M. H. Meaze,Duc Khue Pham,Duc Thiep Tran,강흥식,고인수,조무현,Van Do Nguyen,Van Duan Phung,남궁원,이영석 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.1
The Pohang Neutron Facility based on an electron linac was operated for total neutron crosssection measurements by using the pulsed neutrons produced in a water-cooled Ta-target with a water moderator. We investigated the photo-neutrons produced in the water-cooled Ta-target system by using the Monte-Carlo simulation code MCNPX, version 2.5e, and the results were checked with the experimental values. The optimum conditions of the target system and the experimental setup to maximize the thermal neutron production were investigated.
D. Cano-Ott,F. Alvarez-Velarde,E. Gonzalez-Romero,C. Guerrero,T. Martinez,E. Mendoza,D. Villamarin,M. C. Vicente,U. Abbondanno,N. Colonna,M. H. Meaze,S. Marrone,G. Tagliente,R. Terlizzi,F. Belloni,K. 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The successful development of advanced nuclear systems for sustainable energy production and nuclear waste management depends on high quality nuclear data libraries. Recent sensitivity studies and reports [1][2][3] have identified the need for substantially improving the accuracy of neutron cross-section data for minor actinides. The n_TOF collaboration has initiated an ambitious experimental program for the measurement of neutron capture cross sections of minor actinides. Two experimental setups have been constructed for this purpose: a Total Absorption Calorimeter (TAC) [4] for measuring neutron capture cross-sections of low-mass and/or radioactive samples and a set of two low neutron sensitivity C_6D_6 detectors for the less radioactive materials.
Study of Photon Strength Function of Actinides: the Case of ^(235)U, ^(238)Np and ^(241)Pu
C. Guerrero,F. Alvarez-Velarde,D. Cano-Ott,T. Martinez,E. Mendoza,D. Villamarin,N. Colonna,M. H. Meaze,S. Marrone,G. Tagliente,R. Terlizzi,F. Belloni,U. Abbondanno,K. Fujii,P. M. Milazzo,C. Moreau,G. 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The decay from excited levels in medium and heavy nuclei can be described in a statisticalapproach by means of Photon Strength Functions and Level Density distributions. The study of electromagnetic cascades following neutron capture based on the use of high eciency detectors has been shown to be well suited for probing the properties of the Photon Strength Function of heavy (high level density) and/or radioactive (high background) nuclei. In this work we have investigated for the first time the validity of the recommended PSF of actinides, in particular ^(235)U, ^(238)Np and ^(241)Pu. Our study includes the search for resonance structures in the PSF below S_n and draws conclusions regarding their existence and their characteristics in terms of energy, width and electromagnetic nature.